added tags and updated doc

Author: leandro-benedet-garcia

tutorials/export/feature_tags.rst

@@ -108,6 +108,10 @@ Here is a list of most feature tags in Godot. Keep in mind they are **case-sensi
 +--------------------+----------------------------------------------------------+
 | **web**            | Host OS is a Web browser                                 |
 +--------------------+----------------------------------------------------------+
+| **nothreads**      | Running without threads support                          |
++--------------------+----------------------------------------------------------+
+| **threads**        | Running with threads support                             |
++--------------------+----------------------------------------------------------+
 | **web_android**    | Host OS is a Web browser running on Android              |
 +--------------------+----------------------------------------------------------+
 | **web_ios**        | Host OS is a Web browser running on iOS                  |

tutorials/scripting/gdextension/gdextension_file.rst

@@ -68,6 +68,16 @@ Here is an example of what that can look like:
 
 Here are lists of some of the available built-in options (for more look at the :ref:`feature tags <doc_feature_tags>`):
 
+Tags that have a `no` suffix (like `nothreads`) should be placed after their
+counterparts since they are evaluated in order. Like so:
+
+.. code-block:: none
+
+    [libraries]
+
+    web.release.threads.wasm32 = "res://bin/libgdexample.web.template_release.wasm32.wasm"
+    web.release.nothreads.wasm32 = "res://bin/libgdexample.web.template_release.wasm32.nothreads.wasm"
+
 Running system
 ~~~~~~~~~~~~~~